Klasse External Sheathing Board

Klasse G-board is a high-performance external gypsum-based sheathing board made with special glass fibre and is durable against fire, moisture, mould and impact. Lightweight and easy to carry, it facilitates fast, practical, and economical construction solutions.

Calcium sulphate dihydrate is encased within a glass fibre mat. Additionally nominal amounts of additives such as; starch, foaming agent, dispersants, wax and glass fibre.

Klasse external sheathing board is coloured green on the front face and green on the back face.

To achieve weather tightness, Klasse external sheathing board should be sealed with FireFend™ silicone sealant or joint tape.

Features and benefits:

• Impact Permission Diameter: ≤ 15 mm.
• Number of boards per pallet: 52.
• BBA Certified

ROBUST & DURABLE

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• High density to mitigate fire, wind and installation damage and ensure you deliver a safe, on-time project
• Boasts impressive pull-through strength and high-impact resistance
• Extensively tested in a through wall system to achieve 90mins fire protection (BS EN 1364-1)
• Euroclass A1, is fully non-combustible and suitable for structures over 18m

Test results and interesting points to consider:

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• Acoustic Performance: Acoustically tested according to ISO 10140-2.
• Thermal Performance: Additional insulation can be installed without detrimental effect on the fire or acoustic performance.
• G-board has an extremely stable substrate and will only enlarge by fractions of a millimetre when humidity increases. This means the boards can be installed flush. The board is constructed to be vapour open allowing moisture trapped with a wall to escape.
• As the core is gypsum it locks moisture into the crystal structure which reduces temperatures in the event of a fire.
• G-board construction will not add fuel when used in a façade capacity. It will reduce the transmission of a fire if other materials combust in the façade.